Quora's decision to use python seems to support your theory: "PHP was out of the question. Facebook is stuck on that for legacy reasons, not because it's the b

Quora's decision to use python seems to support your theory: "PHP was out of the question. Facebook is stuck on that for legacy reasons, not because it's the best choice right now. Our main takeaway from that experience is that programming language choice is very important and is extremely costly to change." From: http://www.quora.com/Why-did-Quora-choose-Python-for-its-development http://www.quora.com/Why-did-Quora-choose-Python-for-its-dev...